noun
plural wrenches
[count] US :a tool consisting of a handle with one end designed to hold, twist, or turn an object (such as a bolt or nut)
[count] :a violent twisting or pulling movement - usually singular
[singular] chiefly Brit :something unpleasant that happens and that causes you to feel emotional pain
throw a wrench into the works
US informal :to damage or change (something) in a way that ruins it or prevents it from working properly
verb
wrenches; wrenched; wrenching
to twist and pull with a sudden violent motion [no obj]
[+ obj] :to injure (a part of your body) by making a violent twisting motion
[+ obj] :to take (something) by using force